Slip



A ril 15 1924.

,H. s. McGA RY SLIP Filed Nov. 1. 1923 Patented Apr. I5, 1924.

HENRY S. McG-ARRY, OF HOUSTON, TEXAS.

SLIP.

Application filed November 1, 1923. Serial No. 672,216.

To all whom it may concern:

Be it known that I, HENRY S. MGGARRY,

a citizen of the United States, residing at Houston, in the county of Harris and State of Texas, have invented certain new and useful Improvements in a Slip, of which the following is a specification.

This invention relates to new and useful improvements in a slip.

One object of the invention is to provide a slip, or pipe holder, specially designed for holding pipe suspended in a rotary table or casing head, and so constructed that it will so securely grip the pipe that there will be no danger of'drop'ping the pipe in the bore. When used in connection with a casing head, the slips are of a design and size to readily engage with pump tubing, and the like, to hold the same while the tubing is being withdrawn from or letdown into the casing.

Another object of the invention is to provide a pipe engaging slip having independcut jaws so secured together that each jaw will engage with the pipe, and in case the pipe is out of round or irregular in shape the jaws will adjust themselves to the contour of the pipe and engage with it all the way aroun v further feature of the invention resides in the provision of a slip composed of a plurality of sections, each section having a plurality of pipe engaging jaws, so secured together that they will be securely held in place, and in position to engage with the pipe, and cannot turn around, or rotate on their vertical axes, as is the casewith certain slips now in common use;

A still further feature of'the invention resides in the provision of a sectional slip, each section being provided with .a novel type of handle which is so constructed that when not in use it will'liein-horizontal position out of the way of the workmen and in such position it will be protected against becoming accidentally broken off.

The slip herein described is also compara tively light, and of very simple construction, gridl can be cheaply produced and easily han- With the above and other objects in view, this invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification, and

illustrated in the accompanying drawings, wherein:

Figure 1 shows a' plan view of the slip, showing the handles partly broken away.

Figure 2 shows an inside view of one of the sections; and,

Figure 3 shows a transverse sectional view taken on the line 3-3 of Figure 2.

Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of the figures the numerals 1 and 2 designate the upper and lower keeper plates, respectively, of each section of the slip. These plates are arcuate and are held in spaced relation'by means of the bolts 3, 3, which are fitted upwardly through the lower plate and whose upper ends are threaded through the corresponding upper plate. The lower plate is sustained by the heads of said bolts,'and the bolts are of a length to'space said plates the proper distance apart. The facing sides of said plates are arcuately grooved, thus providing the arcuate'mortises i and 5; Each section of the slip will have a plurality of pipe engaging jaws, as 6, preferably three in number. Each jaw consists of an arouate segment of the complete slip,andtapers downwardly. The inner surface of each jaw is toothed to provide a pipe engaging surface. The ends of the jaws have projecting, arcuate tenons, as 7 and 8, designed to fit loosely in the respective mortises 4 and 5.

The bolts 3' are fitted between" jaws of each section, the adjacent edges of said jaws being grooved lengthwise, as at 9, to provide suitable bearings, between them, to re ceive said bolts.

The slip may be composed of two or more sections, two only being preferred.

The complete slip tapers downwardly, as shown, so asto fit in the conventional seat in the rotary table or casing head, and wedge around the pipe therein.

Each section of the slip is provided with a suitable handle by means of which it may be readily handled by the workmen. This handle consists of the rod 10 whose outer end is formed into a hand grip 11. The other end of the handle is pivoted between the lugs 12, 12, formed integrally with, and upstanding from, each plate 1. The outer sides of these lugs are beveled upwardly toward each other, When the slip is in use,

and in engagement around the pipe, the handles 11 he back in approximately a horizontal position, and will in a great measure be protected by said lugs from heavy objects falling on the rotary table. It is common practice to break up the pipe into sections by the use of the rotary in withdrawing a string of pipe from the bore, and to make up the string with the rotary in letting the string of pipe down into the bore. This op eration is well known to those familiar with drilling bythe rotary process, and in doing this work, the slips are in place around the pipe, not only to hold the pipe suspended in the bore, but also to rotate the same. In accomplishing this work,-a tong is applied to the pipe above the rotary, and it often happens, in starting the rotary, the tong will drop down onto the rotary table, and yet remain in engagement with the pipe, and will consequently be revolved around with the table. In such case the tong jaws will be guided up over the handle by the inclined outer faces of the lugs 12, and injury to, and

the breaking of the section handles is thus avoided.

What I claim is:

1. A pipe holding slip comprising a plurality of sections, each section including an upper and a lower plate, a plurality of pipe engaging jaws between said plates which articulate therewith, the articulating faces being formed, one with a mortise and the other with a tenon, which fits into said mortise, and means holding said plates in fixed relation.

2. A pipe holding slip comprising a plurality of sections, each'se'ction including an upper and a lower plate, jaws between said plates, one of said plates having an ,arcuate mortise, tenons carried by said jaws and fitting into said mortise, and means holding said plates in fixed relation.

3. A pip holding slip comprising a plurality of sections, each section including a cage-like holder, a plurality of jaws in each holder, end tenons formed on the jaws, said 7 holder having mortises in which the tenons fit.

4;; A pipe holding slip comprising a'plurality of sections, each section including arcuate end plates, independent jaws between said plates whose facing sides are lengthwise grooved to form bearings, and rods in said bearings whose respective ends are attached to said plates.

5. A pipe holding slip comprising a plurality of sections, each section including a cagelike holder, a plurality of jaws in each holder, end tenons formed on the jaws, said holder having mortises in which the tenons fit, the adjacent faces of said jaws having lengthwise grooves forming bearings, and said holder including rods which are fitted through said bearings.

6. A pipe holder including a plurality of sections, each section being composed of up per and lower end plates, independent jaws between said plates, spaced lugs carried by the upper plate of each section, the outer sides of said lugs being beveled upward ly toward each other, and a handle for each section pivoted at one end, between the lugs thereof.

7. Apipe holder including a plurality of sections, each section including an upper and a lower end plate, a pair of spaced lugs vupstanding from the upper plate, a handle pivoted at one end between the lugs, independent pipe engaging jaws between said plates.

8. A pipe holder including a pluralit) of sections, each section including an upper and a lower end plate, a pair of spaced lugs upstanding from the upper plate, a handle pivoted at one end between the lugs. independent pipe engaging jaws between said plates, and means holding said plates in fixed relation.

9. A ipe holding slip comprising a plurality 0 sections, each section including an upper and a lower end plate, a plurality of pipe engaging jaws between saidplates which articulate therewith, the articulating parts being formed, one with a mortise and the other with a tenon which fits into said mortise, means holding said plates in fixed relation, and means for moving each section as a unit.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' HENRY S. MCGARRY.

Witnesses:

W. H. DUNLAY, E. V. HARDWAY. 

